| Helena to Cedar Park (Texas) | 1,345.94 mi (2,166.08 km) |
| Helena to Cedar Rapids (Iowa) | 1,052.38 mi (1,693.64 km) |
| Helena to Cedarburg (Wisconsin) | 1,192.15 mi (1,918.59 km) |
| Helena to Celebration (Florida) | 2,073.33 mi (3,336.70 km) |
| Helena to Celina (Ohio) | 1,428.08 mi (2,298.27 km) |
| Helena to Celina (Texas) | 1,217.25 mi (1,958.98 km) |
| Helena to Centennial (Colorado) | 603.12 mi (970.63 km) |
| Helena to Center Point (Alabama) | 1,598.87 mi (2,573.14 km) |
| Helena to Centereach (New York) | 1,962.99 mi (3,159.13 km) |
| Helena to Centerton (Arkansas) | 1,154.06 mi (1,857.27 km) |
| Helena to Centerville (Ohio) | 1,476.78 mi (2,376.66 km) |
| Helena to Centerville (Utah) | 391.69 mi (630.36 km) |
| Helena to Central (Louisiana) | 1,575.52 mi (2,535.55 km) |
| Helena to Central Falls (Rhode Island) | 2,014.17 mi (3,241.49 km) |
| Helena to Central Islip (New York) | 1,960.12 mi (3,154.50 km) |
